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Questions tagged [softwareserial]

A library for emulating UART functionality in software on any available digital IO pins. Use this tag for questions regarding SoftwareSerial.

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ESP-8266 stopped working due to possibly faulty perfboard layout

I have been following this tutorial to set up my ESP8266. I have also recreated on a perfboard the circuit provided in the tutorial, and I intend to use this perfboard circuit in my project. The ...
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1answer
44 views

Did not find fingerprint sensor :( Arduino Mega 2560 Adafruit Fingerprint Sensor

I'm getting the following error when I try to enroll fingerprints using the Arduino Mega 2560 microcontroller along with a Fingerprint Scanner: Did not find fingerprint sensor :( The exact devices ...
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20 views

Making a ATMega328P-PU and computer communicate but not by standard serial communication

So i have been trying to make a ATMega328P-PU using the Arduino bootloader and a computer communicate the same way brands like Logitech and Razer makes their mouse's and keyboard's communicate with ...
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1answer
21 views

ESP8266 SoftwareSerial not receiving any character

I want to use a ESP8266 (ESP12) to receive data from a counter at 9600 baud via SotwareSerial. But my program does not receive any data. I broke it down to the code i attach here. I tried it using ...
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45 views

Why my serial message won't show on another when I try use 2 Arduino communication

I am trying to make a simple chatting program with my 2 arduino uno and 2 PC. But when I tried write a message using PC1 serial monitor the message won't show up on PC2 serial monitor. I can't see the ...
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2answers
25 views

Software serial conflict with WiFi on ESP8266

I'm trying to use an ESP8266 (Wemos D1 mini) to read from a 19.2K serial port and report the results over WiFi. Programming is via Arduino IDE. The code to read the port works just fine if WiFi is not ...
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35 views

Ov7670 (without FIFO) captures the images twice at the same time

I recently started working on an security camera system, with an arduino uno and an OV7670 camera without FIFO memory, and an ESP-8266 to transfer the images to a webserver. Everything is working, ...
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42 views

Can't replace SoftwareSerial by Serial1 on Mega board

This sketch runs well with SoftwareSerial define and the monitor displays device modbus values. But now, i want to replace SoftwareSerial by Serial1 and i have no data. This is the sketch with ...
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33 views

vk2828u7g5lf GPS module over SoftwareSerial

So my goal was simple. Trying to get a GPS speed, and show it on a display (later use it to control a stepper motor). I am using the vk2828u7g5lf GPS module from Banggood, which after days of ...
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1answer
45 views

mySerial.available() is returning 0

I am using bluetooth hc-05, arduino uno and ap app created by mit app inventor.The problem is myserial.available is returning 0 and hence its loop is not getting executed. I had connected four pins of ...
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2answers
94 views

ESP8266 ASCII to HEX convertion and checking

I am trying to convert ASCII to hex and check if the hex is equal to that hex that I want. For example: 1B 42 05 it means B in ASCII, I need to check if that hex is equal to 1B 42 05. Here I need ...
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Print request return from ESP8266 using arduino as bridge

I am trying to achieve something that's probably really simple. I have an ESP8266 module connected to an arduino uno board. The ESP rx and tx are connect to two digital pins in the arduino. I'm also ...
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1answer
184 views

getting error 'Serial' was not declared in this scope

I am adding Dust Sensor to my particle photon project at home, I got this GitHub project that I want to test before implementing a final code. I am not an expert in cpp, I wanted to modularise the ...
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3answers
78 views

I can send on software serial, but not read?

I've been cracking my head over this for a long while. Like many before me, I'm trying to send and receive data from a HM-10 bluetooth module, arduino mega adk and the app called BLE Scanner. I've ...
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1answer
19 views

Serial data not parsed correctly

The code I have works for the most part but when I send data via bluetooth received over software serial, too quickly, it is not parsed correctly. I'm a bit stuck with what can be done to a void the ...
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2answers
125 views

Alternative Rx/Tx Pins for Arduino Uno and Pro Mini

Do they have specific pins that is best to be use as Rx/Tx pins (aside from D0 and D1)? If so, what makes them special? edit: What pin feature i should look out for when choosing the rx/tx pin? Is ...
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1answer
101 views

ESP8266 Software serial to ATmega 328 is not properly working

Thanks in advance.. We are having esp8266-12E chip and Atmega328 connected as follows, ESP 12 pin as Tx,13 pin as Rx && Atmega328 13pin as Rx, 12pin as Tx. Everything works fine, but while ...
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1answer
48 views

Accessing one code using another code on RobotDyn Uno+WiFi board [closed]

Ok so I've been trying to do this for quite some time now. Still couldn't get it to work. I am trying to read a ESP8266 WiFi program from a normal Arduino Uno program. I've seen some people do this: #...
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1answer
62 views

Unexpected result with the GSM module A6

I have a GSM A6 module, like this one. I'm going to use an Arduino Nano as a bridge to communicate with it, I have an external power source (since I read that this module can consume up to 2A at its ...
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1answer
30 views

Unable to receive data when using multiple SoftSerial on Arduino Nano

I am trying to use several (four) software-based serial ports to talk to different peripheral hardware. However, I am unable to receive data through the SoftSerial when using more than one software ...
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1answer
112 views

array to serial

i want to send an array of int to another arduino by serial. To garantie a better robust during the transmission, i added < and > with endMarker and startMarker. The receiver wait until the ...
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2answers
78 views

Two serials can't work on the same speed

I have a device which sits on pins 10/11 of Arduino UNO. I am trying to send commands from my PC using Arduino to relay my commands to the device via Serial. The problem is that if I use speed 9600 ...
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2answers
263 views

how to make GPRS/GSM SIM900 shield work with gps neo-6M module using Arduino UNO board

I'm a beginer to arduino program.i will like to make a program that will send latitude and longitude on my mysql database.so since 3 days i try to learn how to use all this material(GPRS/GSM SIM900 ...
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1answer
105 views

Passing HardwareSerial and SoftwareSerial as a Class Property

I wish to know if there is a way to use a single property Serial0 to hold a HardwareSerial or a SoftwareSerial or other class instances supporting basic methods such as available(), read() and write(),...
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1answer
131 views

Bluetooth OBD2 ELM327 connectivity issues

I made a little project using an Arduino UNO, a 3.5" display, a HC-05 bluetooth module and an ELM327 (cheap ebay clone). I managed to establish communication, read the data, interpret and display it, ...
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1answer
50 views

Is two modules using Serial Interface on one Arduino Uno possible?

I was wondering if I have both a Bluetooth HC-05 module and a GPS module (uBlox 7N) is it possible both for both to be using the serial interface? I'm aware they cant be operating simultaneously ...
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2answers
402 views

How to write a library that support both HW and SW Serial communication and allow user to chose which one to use?

I'm working on a library for Arduino/ESP8266/Teensy that use serial to send AT commands. I want to make it as customizable as possible, so I avoided to hardcode the serial and I ask for a reference in ...
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1answer
27 views

Entire arrays are not read by Processing sent by Arduino unless cord is unplugged and plugged back in?

I am using an Arduino to read sensors and then send the data to the serial port for Processing to read. It works totally fine when I first download the code and run the Processing program. But if I ...
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3answers
45 views

For Arduino, is there a meaningful difference between carriage returns?

Serial.write(0x0d); // hex Serial.write(13); // ASCII Serial.write('\r'); // char Is one more efficient? I read how it depends on the terminal program. So does that mean the IDE? (This is my ...
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1answer
378 views

Sending PUBX commands to GPS Board (Ublox NEO-6M) through SoftwareSerial

I am having trouble parsing NMEA sentences coming from a GY-NEO6MV2 board (https://www.cytron.io/p-gps-neo6mv2), using the TinyGPS (https://github.com/mikalhart/TinyGPS) library. The GPS board itself ...
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1answer
45 views

Serial communication between 2 arduino's doesn't works when Sending string in a program with a lot of functions

Note : This question is completely different from the questions that I have asked before although the code snippets might be the same, So please do not waive it as a duplicate right when you see ...
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1answer
43 views

HC-05 modules with joystick driven platform [closed]

I am working to create a joystick controlled platform using bluetooth to communicate, but am having several problems. The platform https://www.dfrobot.com/wiki/index.php/Cherokey_4WD_Mobile_Platform_(...
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46 views

Arduino loses communication with bluetooth when sending commands to nodemcu esp8266

i've been working on a project using an Arduino UNO, Bluetooth Module HC-06 and NodeMCU esp8266, the project consists on turning leds on via bluetooth and telling the esp8266 that the leds were turned ...
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47 views

Serial communication between GPS and Arduino Ethernet

I'm trying to read out GPS positions from a serial GPS module I have. I'm using an Arduino Ethernet and a Haicom HI-204 III GPS (http://www.haicom.com.tw/driver/hi-204iii_usb.pdf). If I connect the ...
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3answers
48 views

Bluetooth Modules not communicating correctly

I plug in BT rx to digital 11, BT tx to digital 10 and then 5v and ground from the HC-05 to the arduino. I then upload this code to the HC-05 that is set as a master. #include <SoftwareSerial.h>...
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165 views

How to check for valid Serial data, then break?

I'm having trouble completing this code for my university final project. I feel like I'm almost there, but I can't seem to find the final buttons to press. I'm using the Arduino Pro Micro. I have one ...
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3answers
62 views

Read one value from continuous data stream at a lower frequency

I am working on a university final project and have run into a problem with programming Arduino, after a 3 year hiatus. I have a pressure transducer that is sending pressure data at 10Hz. I have ...
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1answer
64 views

Arduino Mega Pins for SoftwareSerial (vs. AltSoftSerial)

I am currently looking at using an Arduino Mega to build a MIDI Receive box that will then pump the data over USB, but am having design issues/uncertainties with the Arduino's receiving end. I am ...
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219 views

Attiny85 & NEO-6 GPS

I've been trying to use an attiny85 to reduce my project footprint, thing is, it looks like something is very wrong. The project works just fine using an Arduino Uno and produces the expected results. ...
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0answers
50 views

TinyScreen+ coupled with 433MHZ Radio (Setup)

I'm using the following shields: 1. TINYSCREEN+ (PROCESSOR, OLED & USB IN ONE) https://tinycircuits.com/products/tinyscreenplus 2. 433MHZ LONG RANGE RADIO TINYSHIELD https://tinycircuits.com/...
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74 views

Issue in transferring the serial communication data over radio using NRF24L01 and Arduino Uno

I am trying to transfer data recorded by one of my Arduino UNO boards (which is recording temperature data using DHT11) to another board that could be UNO or WeMos D1. The problem is that the UNO ...
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2answers
130 views

Can increasing the size of the software RX buffer cause problem in Arduino Uno

If I were to increase the of the buffer array from 64 to say 512 will this bring any long term problem in the Arduino Uno. Changing from this: #ifndef _SS_MAX_RX_BUFF #define _SS_MAX_RX_BUFF 64 // ...
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1answer
62 views

i uploaded the code but when i open the serial monitor, but the 'sendCommand' isn't working in serial monitor…plzz help

#include <SoftwareSerial.h> #define DEBUG true SoftwareSerial esp8266(2, 3); // RX, TX void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); //for ...
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330 views

when i compile this code it always 'sendCommand' was not declare in this scope..plzz help

#include <SoftwareSerial.h> #define DEBUG true SoftwareSerial esp8266(10, 11); // RX, TX void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); //for ...
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60 views

Sending data over serial results in garbled text

I am using the ESP8266 WiFi module to receive a string and send it to a Arduino over serial. I am using the SoftwareSerial library to do this. My problem is that the string is sometimes garbled after ...
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487 views

Reading +IPD response from serial.read() using Arduino UNO and ESP8266

I have a python server running on my PC and I am using an Arduino Uno (wifi enabled by a ESP8266 chip) as the client. I can make the the server and client communicate using AT commands as shown below: ...
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801 views

SIM800 GSM module with Arduino Uno + SoftwareSerial Library

I am trying to use SIM800 GSM Module with Arduino Uno. ARDUINO DIGITAL PIN 9 is connected to TX of GSM Module ARDUINO DIGITAL PIN 10 is connected to RX of GSM Module ARDUINO is powered by PC USB GSM ...
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1answer
82 views

Use ATtiny85 to perform initial config on a Cisco router using its USB console port

We have 200+ brand new Cisco routers that have USB console ports (but not the old RJ45 serial console ports). This is quite frustrating because the routers didn't ship with console cables and Cisco ...
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23 views

How do I improve Bluetooth communication?

How do I improve Bluetooth communication? You will see, in this image using the Bluetooth monitor application, in order to receive the "ON" response, I had to repeatedly send the "O" character: The ...
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2answers
1k views

Receive data from Arduino board to Android application

I'm trying to receive data and print it on a label of my application, but I can not get it. Actually, I have 0 experience with Arduino. It's the first time I see this. I read this tutorial to receive ...